Troubleshooting
Slender Begonia problems — and how to fix them
Slender Begonia (Begonia gracilis) is generally low-drama, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Tuber rot in winter storage
Tubers stored in damp compost or cold (<10°C) conditions rot quickly; dry them for a week after lifting, dust with sulphur powder, and store in dry vermiculite at 10–13°C.
Botrytis (grey mould)
The delicate foliage is prone to grey mould in cool, humid, low-airflow conditions; remove any affected material promptly and ensure good ventilation around plants.
Prevent slender begonia problems before they start
Most slender begonia issues are care-mismatch, not bad luck. Dial in the basics:
Slender Begonia problems — FAQ
Why is my slender begonia tuber rot in winter storage?
Tubers stored in damp compost or cold (<10°C) conditions rot quickly; dry them for a week after lifting, dust with sulphur powder, and store in dry vermiculite at 10–13°C.
Why is my slender begonia botrytis (grey mould)?
The delicate foliage is prone to grey mould in cool, humid, low-airflow conditions; remove any affected material promptly and ensure good ventilation around plants.